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secondary 4 | A Maths
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Date Posted: 4 years ago
Views: 190
y = 3x - 27/x2
= 3x - 27x^-2
dy/dx
= 3 + 54x^-3
= 3 + 54/x3
which is obviously positive when x > 0
Since dy/dx > 0 in this region, the curve is always positive in this region.
= 3x - 27x^-2
dy/dx
= 3 + 54x^-3
= 3 + 54/x3
which is obviously positive when x > 0
Since dy/dx > 0 in this region, the curve is always positive in this region.
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